JPS5471618A - Electro-acoustic transducer - Google Patents

Electro-acoustic transducer

Info

Publication number
JPS5471618A
JPS5471618A JP13876477A JP13876477A JPS5471618A JP S5471618 A JPS5471618 A JP S5471618A JP 13876477 A JP13876477 A JP 13876477A JP 13876477 A JP13876477 A JP 13876477A JP S5471618 A JPS5471618 A JP S5471618A
Authority
JP
Japan
Prior art keywords
magnetic field
diaphragm
case
spacing
alternating currents
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP13876477A
Other languages
Japanese (ja)
Other versions
JPS6247040B2 (en
Inventor
Haimi Takasaki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP13876477A priority Critical patent/JPS5471618A/en
Publication of JPS5471618A publication Critical patent/JPS5471618A/en
Publication of JPS6247040B2 publication Critical patent/JPS6247040B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

PURPOSE:To obtain a transducer which causes less parasitic vibrations, resonates at low frequencies and is able to provide large amplitudes by constituting a d.c. magnetic field and providing a balance in space to the diaphragm without using any mechanical elastic material. CONSTITUTION:Another magnet 3 has been secured on the bottom inside of a case, and a reducing valve 6 is provided near the bottom of the case. Since an 0-ring gasket hardly hampers the piston motion of a diaphragm 1, the diaphragm assembly is attracted to the case side and the intermagnet spacing (d) becomes smaller, blancing at the spacing D. When alternating currents are flowed to a signal winding 4, an AC magnetic field is generated and this magnetic field is increased or decreaseed by superposing the DC magnetic field of a magnet 3'. As a result, vibrations according to the alternating currents are induced and sound waves are radiated from the outside surface of the diaphragm.
JP13876477A 1977-11-17 1977-11-17 Electro-acoustic transducer Granted JPS5471618A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13876477A JPS5471618A (en) 1977-11-17 1977-11-17 Electro-acoustic transducer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13876477A JPS5471618A (en) 1977-11-17 1977-11-17 Electro-acoustic transducer

Publications (2)

Publication Number Publication Date
JPS5471618A true JPS5471618A (en) 1979-06-08
JPS6247040B2 JPS6247040B2 (en) 1987-10-06

Family

ID=15229633

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13876477A Granted JPS5471618A (en) 1977-11-17 1977-11-17 Electro-acoustic transducer

Country Status (1)

Country Link
JP (1) JPS5471618A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4711485U (en) * 1971-03-03 1972-10-11
JPS49122840U (en) * 1973-02-14 1974-10-21

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4711485U (en) * 1971-03-03 1972-10-11
JPS49122840U (en) * 1973-02-14 1974-10-21

Also Published As

Publication number Publication date
JPS6247040B2 (en) 1987-10-06

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